Annotations: 9CBN

HAstV1 spike in complex with neutralizing Fabs 3H4 and 3B4

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	Reovirus_L2_GTase	e9cbnH1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
F	Hom_end	e9cbnF01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Hom_end	ECOD (v295.2)
G	Reovirus_L2_GTase	e9cbnG1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
E	Hom_end	e9cbnE01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Hom_end	ECOD (v295.2)
D	Reovirus_L2_GTase	e9cbnD1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
C	Reovirus_L2_GTase	e9cbnC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Reovirus_L2_GTase	ECOD (v295.2)
B	Hom_end	e9cbnB01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Hom_end	ECOD (v295.2)
A	Hom_end	e9cbnA01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Hom_end	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
F, H	Light Chain	IGLV1	Lambda	structural protein	SAbDab (2026-10-02)
E, G	Heavy Chain	IGHV2	-	structural protein	SAbDab (2026-10-02)
B	Light Chain	IGKV5	Kappa	structural protein	SAbDab (2026-10-02)
A	Heavy Chain	IGHV1	-	structural protein	SAbDab (2026-10-02)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C, D	PF12226	Turkey astrovirus capsid protein (Astro_capsid_p)	Turkey astrovirus capsid protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F, H	HAstV1 neutralizing Fab 3H4 lambda chain	-	-	-
E, G	HAstV1 neutralizing Fab 3H4 heavy chain	-	-	-
C, D	Structural protein	-	import into cell receptor-mediated endocytosis of virus by host cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization vesicle-mediated transport biological process involved in interaction with host biological process involved in symbiotic interaction localization symbiont entry into host cell clathrin-dependent endocytosis viral process symbiont entry into host import into cell receptor-mediated endocytosis of virus by host cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization vesicle-mediated transport biological process involved in interaction with host biological process involved in symbiotic interaction localization symbiont entry into host cell clathrin-dependent endocytosis viral process symbiont entry into host cellular process clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell	host cellular component host extracellular region cellular anatomical structure other organism part viral capsid T=3 icosahedral viral capsid icosahedral viral capsid virion component
B	HAstV1 neutralizing Fab 3B4 kappa chain	-	-	-
A	HAstV1 neutralizing Fab 3B4 heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C, D	IPR004337	Astrovirus capsid protein, inner core domain	Domain
C, D	IPR029053	Viral coat protein subunit	Homologous Superfamily
C, D	IPR022027	Turkey astrovirus capsid protein	Family